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Title:
WATER ABSORBING RESIN AND ITS PREPARATION
Document Type and Number:
Japanese Patent JP2001079829
Kind Code:
A
Abstract:

To provide a water absorbing resin with excellent physical properties prepared by surely mixing fine powder with a water-containing gel-like polymer and a method for preparing the water absorbing polymer by which the water- absorbing polymer can be highly efficiently prepared.

Fine powder of a water-absorbing gel-like polymer with a smaller size than a specified range generated in the manufacturing process of the water absorbing resin and fine powder of an additive for improving various characteristics of a water absorbing resin with the roughly ground water-containing gel-like polymer are fed from a feeding hole 14 of a screw type extruder and they are kneaded in a uniform pressure part in a casing 11. Then, while compression force to the water-containing gel-like polymer is elevated at a compression part in the neighborhood of an extrusion hole provided with a porous plate 17, the water-containing gel-like polymer is extruded. It is possible by this method to surely and sufficiently mix the fine powders into the water-containing gel-like polymer and to make them into fine granules.


Inventors:
Miyake, Koji
Gotou, Eri
Hatsuda, Takumi
Fujino, Shinichi
Ishizaki, Kunihiko
Application Number:
JP2000000194948
Publication Date:
March 27, 2001
Filing Date:
June 23, 2000
Export Citation:
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Assignee:
NIPPON SHOKUBAI CO LTD
International Classes:
A61F13/15; A61F13/53; A61L15/00; B29B7/14; B29B7/90; B29C48/345; C08J3/12; C08J3/24; C08J5/00; (IPC1-7): B29B7/14; A61F13/53; A61L15/00; B29B7/90; B29C47/30; C08J3/12; C08J5/00
Attorney, Agent or Firm:
原 謙三